Malicious PDF — malware analysis report

Static analysis result for SHA-256 130cce7f9534a611…

MALICIOUS

PDF

64.0 KB Created: 2021-09-28 16:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 99f341e835f71e23538ed3ff21c4774d SHA-1: b91a0225a47f54479fb54ce0ae1865671151330c SHA-256: 130cce7f9534a611267f30ceee22c1eca19d2774efc5d44397acac382ef802f4
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised websites and disposable domains, likely intended to trick users into downloading malicious files. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was unreadable, limiting further analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6298

Heuristics 4

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.dereformasenalicante.com/archivos/files/wewisowofefijoxunenun.pdf In PDF document text
    • https://dailyhondaotomientay.com/upload/files/34458102258.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/flvqfi8pklg7m6v7n8pbc0tho2/pisokitavavupexugalo.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/4686943883.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c488fa37ad3162d03b220f677d6f80d8/46455641555.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/nunokiragezo.pdfIn PDF document text
    • http://schokoladenfontaene.de/idata/piroteletutazijare.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/d2m91uu20f226ado7k07g9un71/vazazidikide.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/95952689308.pdfIn PDF document text
    • https://hasekei.jp/userfiles/file/dezejiludodamanusi.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/98782441570.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/lezikajutu.pdfIn PDF document text
    • http://a-pro-peau.fr/userfiles/file/32438993167.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/zemulate.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ahhqq889jlrbr558c29huffmlm/pitug.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/ludutozewebomanufa.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/30582175014.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/67824019801.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/5346203060.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/19236531426.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/vovukunumizosi.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/70457bc93c95b543914f84efd4d2be9b/22524297540.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=icey+apk+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000add9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADD9 15908 bytes
SHA-256: f9e264b02c5f8144587f079a7d18b9d67682843c73dde5863101aa61fa77e333
font_01_sfnt_off0000d661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 10292 bytes
SHA-256: 7116d59c41e780256654cb045540a63d09934ea85a1900c86200b712518acd05